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Seismic information acquisition system and method

A technology for collecting system and seismic information, applied in seismic signal recording, seismology, seismology for areas covered by water, etc. It can solve the problem of poor seismic effect and the difficulty of estimating aliasing by the method of separation of continuous seismic records Energy and other issues to achieve the effect of improving the separation accuracy

Inactive Publication Date: 2020-11-13
GUANGZHOU MARINE GEOLOGICAL SURVEY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, it is difficult to estimate the aliasing energy in the separation method of continuous seismic records, especially under the complex geological conditions of the seabed, it is difficult to convert continuous records with energy aliasing into single-shot records, resulting in poor separation effect of continuous seismic records

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  • Seismic information acquisition system and method
  • Seismic information acquisition system and method

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Effect test

Embodiment 1

[0036] Seismic information acquisition system, including

[0037] Data logging module;

[0038] An auxiliary channel module, the auxiliary channel module is connected with the data recording module, and the auxiliary channel module converts the received analog signal into a digital signal and stores it into the data recording module;

[0039] A signal processing module, the signal processing module is connected with the near-field detector, the signal processing module is connected with the auxiliary channel module, and the signal processing module is used for stepping down and filtering the signal, and processing the processed An analog signal is passed to the auxiliary channel module. There are 4 auxiliary channel modules and 4 signal processing modules, and one signal processing module is connected to one auxiliary channel module. The signal processing module includes a step-down circuit and a filter circuit, the output end of the step-down circuit is connected to the fil...

Embodiment 2

[0048] A seismic information acquisition method, comprising:

[0049] S10. Generate continuous recording data and non-continuous recording data through forward modeling, and the non-continuous recording data does not have data of aliasing energy;

[0050] Set several vibration sources, the vibration source can be an air gun vibration source, one vibration source is a shot point, and the vibration source is excited according to the preset time interval. For the continuous recording method, the geophone continues to receive until all the seismic sources stop exciting; while for the discontinuous recording, the geophone does not continue to receive but only records each excitation of the seismic source. After each excitation, the geophone stops receiving. The detector does not start receiving until the next excitation.

[0051] Continuously recorded data and non-continuously recorded single-shot data can be obtained respectively through two forward modeling simulations. It is on...

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Abstract

The invention relates to the field of marine geological survey, provides a seismic information acquisition system and method, and aims to solve the problem of near-field wavelet acquisition. The seismic information acquisition system provided by the invention comprises a data recording module; an auxiliary channel module which is connected with the data recording module and is used for convertingreceived analog signals into digital signals and storing the digital signals in the data recording module; and a signal processing module which is connected with a near-field detector, is connected with the auxiliary channel module, and is used for carrying out voltage reduction and filtering processing on the signals and transmitting the processed analog signals to the auxiliary channel module. Near-field wavelet data can be accurately collected and recorded.

Description

technical field [0001] The invention relates to the field of marine geological survey, in particular to a seismic information acquisition system. Background technique [0002] The air gun seismic source has been used as the mainstream seismic source in the process of marine seismic data acquisition. In the process of seismic data data processing, the inverse wavelet operator is usually obtained by the statistical results of data processing software. The statistical error is compared with Another algorithm is to directly use the far-field wavelet calculation simulated by the computer in the air gun source room. In the actual production process, the objective factors such as the change of the distance between the seismic source, individual air guns not firing, out of synchronization, self-excitation, and closing the gun The difference between the actual far-field wavelet and the indoor simulated far-field wavelet is often large. In actual data processing, ideal results are of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/24G01V1/38
CPCG01V1/3808G01V1/24G01V2210/1423
Inventor 郝小柱柴祎黄建宇韦成府
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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